Subtract 63/8 from 30/63, Solve 30/63

Subtract 63/8 from 30/63

1^st number: 30/63, 2^nd number: 7 7/8

30/63 - 63/8 is -1243/168.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 63 × 8 = 504,
30/63 = 30 × 8/63 × 8 = 240/504
Likewise, for the 2nd fraction, since 8 × 63 = 504,
63/8 = 63 × 63/8 × 63 = 3969/504
Subtract the two like fractions:
240/504 - 3969/504 = 240 - 3969/504 = -3729/504
After reducing the fraction, the answer is -1243/168

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